Question...

I was wondering.. Is shounen and seinen for guys or is it normal that girls read them too? Because I am a girl and I like seinen, even though I only just read three of them. But I like it, so is it normal for a girl to read 'guy stuff'

Oh, and I have another question too. I've just read Holyland. I was wondering if there is another manga like that? I mean.. About a boy who looks skinny and 'normal', but actually is strong or can become insane or stuff like that.